You can get them for like .15-7 now I think.
https://www.bitmit.net/en/item/58349-usb-block-erupter-asic-miner-bitcoin-fpga-blade-bfl-avalon-new
I never thought I'd live to see them drop below 0.75 BTC
Friedcat is selling them for as low as 0.1 BTC.